cgroups inside singularity container

roles/cobald/files/start-drone

@@ -8,15 +8,27 @@ function handler_quit(){
 	echo "shutdown container"
 	singularity instance stop slurm-drone
 	scontrol update NodeName=${nodename} State=FUTURE
+	umount /inner-cgroup/freezer
+	umount /inner-cgroup
 	exit 0
 }
 
-trap handler_quit EXIT
 
 # set -x
 
+trap handler_quit EXIT
+
+echo "mounting cgroups"
+mkdir /inner-cgroup
+mount -t tmpfs none /inner-cgroup
+mkdir /inner-cgroup/freezer/
+mount --bind /sys/fs/cgroup/freezer/slurm/ /inner-cgroup/freezer/
+mount -o remount,ro /inner-cgroup
+
 echo "starting ${nodename}"
-singularity instance start --writable-tmpfs /shared/slurmd.sif slurm-drone \
+singularity instance start \
+	-B /inner-cgroup/:/sys/fs/cgroup/ \
+	--writable-tmpfs /shared/slurmd.sif slurm-drone \
 	slurm-ctl ${nodename}
 if [ $? -eq 0 ] ; then
 	echo "container started, sleeping $(( 60 * ${SLURM_Walltime}))"